Hi there,
We are currently implementing a sip phone, and we want to make calls to
each other use a phone number.
Here is my question:
Q1. How can I use REGISTER method to register this tel uri to the
registrar?
In Page 57 of rfc3261:
To: The To header field contains the address of record whose
registration is to be created, queried, or modified.
The To header field and the Request-URI field typically differ,
as the former contains a user name.
This address-of-record MUST be a SIP URI or SIPS URI.
So there is only one place I can put this tel uri into, that's Contact
header field, that leads to my 2nd question:
Q2. Create the binding. Is my proceedure correct?
Say my ua's IP address is: 192.168.0.200, proxy is at 192.168.0.100, it
sends the REGISTER request to registrar with these fields:
From: <sip:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> >
To: <sip:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> >
Contact: <tel:1234>
This should create a binding of <sip:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> > <==> <tel:1234> if ther registration is
successful.
After create the binding, I think other UA can make call to the our sip
phone use tel:1234,
[Chris Boulton] The UA will only be reachable if you dial the AOR -
sip:[EMAIL PROTECTED] that appears in the To header. This would then
resolve to the required tel: address. You would not be able to dial
this directly and expect the binding to resolve.
Q3. Other ua use tel:1234 to call my phone, but the proxy failed to
proxy the INVITE request, why?
INVITE tel: 1234 SIP/2.0
From:
<sip:[EMAIL PROTECTED]:5060>;tag=f26388-0-13c4-384313a1-3b1f06d7-38431
3a1
To: <tel: 1234>
Call-ID:
<mailto:[EMAIL PROTECTED]>
[EMAIL PROTECTED]
CSeq: 1 INVITE
Via: SIP/2.0/UDP
192.168.0.215:5060;branch=z9hG4bK-384313a1-c604acfc-435bd214
Max-Forwards: 70
Contact: <sip:[EMAIL PROTECTED]:5060>
Content-Type: application/SDP
Content-Length: 150
I think the proxy will resolve the To-uri to a correct sip uri, that the
proxy should forward the INVITE to <sip:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> >, but it doesn't.
The proxy can not resolve the tel:1234 to my phone, the the transaction
is terminated due to resolve failure.
I wondering why? Any comments?
Thanks and Regards
David Pang
Tel:86-755-33359773
Fax:86-755-33359755
20F/FGH, Times Financial Center
No.4001 ShenNan Zhong Rd., Shenzhen, China. 518034
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
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